diff --git a/CHANGELOG.md b/CHANGELOG.md
index 174ee30..eebcf11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@
 ## [Unreleased]
 [Unreleased]: https://github.com/cashapp/burst/compare/0.6.0...HEAD
 
+**Added**
+
+ * Basic support for JUnit 5. Burst doesn't support JUnit 5 tests that populate parameters from extensions.
+
 ## [2.0.0] *(2024-10-30)*
 [2.0.0]: https://github.com/cashapp/burst/releases/tag/2.0.0
 
diff --git a/burst-gradle-plugin/src/test/kotlin/app/cash/burst/gradle/BurstGradlePluginTest.kt b/burst-gradle-plugin/src/test/kotlin/app/cash/burst/gradle/BurstGradlePluginTest.kt
index 736b1e2..819dadf 100644
--- a/burst-gradle-plugin/src/test/kotlin/app/cash/burst/gradle/BurstGradlePluginTest.kt
+++ b/burst-gradle-plugin/src/test/kotlin/app/cash/burst/gradle/BurstGradlePluginTest.kt
@@ -261,6 +261,31 @@ class BurstGradlePluginTest {
     }
   }
 
+  @Test
+  fun junit5() {
+    val projectDir = File("src/test/projects/junit5")
+
+    val taskName = ":lib:test"
+    val result = createRunner(projectDir, "clean", taskName).build()
+    assertThat(result.task(taskName)!!.outcome).isIn(*SUCCESS_OUTCOMES)
+
+    val testResults = projectDir.resolve("lib/build/test-results")
+
+    with(readTestSuite(testResults.resolve("test/TEST-CoffeeTest_Regular.xml"))) {
+      assertThat(testCases.map { it.name }).containsExactlyInAnyOrder(
+        "kotlinTestTest_Milk()",
+        "kotlinTestTest_None()",
+        "kotlinTestTest_Oat()",
+        "orgJunitJupiterApiTest_Milk()",
+        "orgJunitJupiterApiTest_None()",
+        "orgJunitJupiterApiTest_Oat()",
+        "orgJunitTest_Milk",
+        "orgJunitTest_None",
+        "orgJunitTest_Oat",
+      )
+    }
+  }
+
   private fun createRunner(
     projectDir: File,
     vararg taskNames: String,
diff --git a/burst-gradle-plugin/src/test/projects/junit5/build.gradle.kts b/burst-gradle-plugin/src/test/projects/junit5/build.gradle.kts
new file mode 100644
index 0000000..738b082
--- /dev/null
+++ b/burst-gradle-plugin/src/test/projects/junit5/build.gradle.kts
@@ -0,0 +1,41 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
+
+buildscript {
+  repositories {
+    maven {
+      url = file("$rootDir/../../../../../build/testMaven").toURI()
+    }
+    mavenCentral()
+    google()
+  }
+  dependencies {
+    classpath("app.cash.burst:burst-gradle-plugin:${project.property("burstVersion")}")
+    classpath(libs.kotlin.gradlePlugin)
+  }
+}
+
+allprojects {
+  repositories {
+    maven {
+      url = file("$rootDir/../../../../../build/testMaven").toURI()
+    }
+    mavenCentral()
+    google()
+  }
+
+  tasks.withType(JavaCompile::class.java).configureEach {
+    sourceCompatibility = "1.8"
+    targetCompatibility = "1.8"
+  }
+
+  tasks.withType(KotlinJvmCompile::class.java).configureEach {
+    compilerOptions {
+      jvmTarget.set(JvmTarget.JVM_1_8)
+    }
+  }
+
+  tasks.withType<Test> {
+    useJUnitPlatform()
+  }
+}
diff --git a/burst-gradle-plugin/src/test/projects/junit5/lib/build.gradle.kts b/burst-gradle-plugin/src/test/projects/junit5/lib/build.gradle.kts
new file mode 100644
index 0000000..afcc227
--- /dev/null
+++ b/burst-gradle-plugin/src/test/projects/junit5/lib/build.gradle.kts
@@ -0,0 +1,10 @@
+plugins {
+  kotlin("jvm")
+  id("app.cash.burst")
+}
+
+dependencies {
+  testImplementation(kotlin("test"))
+  testImplementation(libs.junit)
+  testRuntimeOnly(libs.junit.vintage.engine)
+}
diff --git a/burst-gradle-plugin/src/test/projects/junit5/lib/src/test/kotlin/CoffeeTest.kt b/burst-gradle-plugin/src/test/projects/junit5/lib/src/test/kotlin/CoffeeTest.kt
new file mode 100644
index 0000000..4290954
--- /dev/null
+++ b/burst-gradle-plugin/src/test/projects/junit5/lib/src/test/kotlin/CoffeeTest.kt
@@ -0,0 +1,32 @@
+import app.cash.burst.Burst
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+
+@Burst
+class CoffeeTest(
+  private val espresso: Espresso,
+) {
+  @BeforeTest
+  fun setUp() {
+    println("set up $espresso")
+  }
+
+  @kotlin.test.Test
+  fun kotlinTestTest(dairy: Dairy) {
+    println("@kotlin.test.Test running $espresso $dairy")
+  }
+
+  @org.junit.Test
+  fun orgJunitTest(dairy: Dairy) {
+    println("@org.junit.Test running $espresso $dairy")
+  }
+
+  @org.junit.jupiter.api.Test
+  fun orgJunitJupiterApiTest(dairy: Dairy) {
+    println("@org.junit.jupiter.api.Test running $espresso $dairy")
+  }
+}
+
+enum class Espresso { Decaf, Regular, Double }
+
+enum class Dairy { None, Milk, Oat }
diff --git a/burst-gradle-plugin/src/test/projects/junit5/settings.gradle.kts b/burst-gradle-plugin/src/test/projects/junit5/settings.gradle.kts
new file mode 100644
index 0000000..78eeed4
--- /dev/null
+++ b/burst-gradle-plugin/src/test/projects/junit5/settings.gradle.kts
@@ -0,0 +1,9 @@
+dependencyResolutionManagement {
+  versionCatalogs {
+    create("libs") {
+      from(files("../../../../../gradle/libs.versions.toml"))
+    }
+  }
+}
+
+include(":lib")
diff --git a/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstApis.kt b/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstApis.kt
index 7e5615a..212feb1 100644
--- a/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstApis.kt
+++ b/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstApis.kt
@@ -17,15 +17,25 @@ package app.cash.burst.kotlin
 
 import org.jetbrains.kotlin.backend.common.extensions.IrPluginContext
 import org.jetbrains.kotlin.ir.declarations.IrAnnotationContainer
+import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
+import org.jetbrains.kotlin.ir.types.classOrNull
 import org.jetbrains.kotlin.ir.util.hasAnnotation
 
 /** Looks up APIs used by the code rewriters. */
 internal class BurstApis private constructor(
   pluginContext: IrPluginContext,
-  testPackage: FqPackageName,
+  private val testClassSymbols: List<IrClassSymbol>,
 ) {
+  val burstValues: IrFunctionSymbol = pluginContext.referenceFunctions(burstValuesId).single()
+
+  fun findTestAnnotation(function: IrSimpleFunction): IrClassSymbol? {
+    return function.annotations
+      .mapNotNull { it.type.classOrNull }
+      .firstOrNull { it in testClassSymbols }
+  }
+
   companion object {
     fun maybeCreate(pluginContext: IrPluginContext): BurstApis? {
       // If we don't have @Burst, we don't have the runtime. Abort!
@@ -33,21 +43,20 @@ internal class BurstApis private constructor(
         return null
       }
 
-      if (pluginContext.referenceClass(junitTestClassId) != null) {
-        return BurstApis(pluginContext, junitPackage)
-      }
+      val testClassSymbols = listOfNotNull(
+        pluginContext.referenceClass(junit5TestClassId),
+        pluginContext.referenceClass(junitTestClassId),
+        pluginContext.referenceClass(kotlinTestClassId),
+      )
 
-      if (pluginContext.referenceClass(kotlinTestClassId) != null) {
-        return BurstApis(pluginContext, kotlinTestPackage)
+      // No @Test annotations? No Burst.
+      if (testClassSymbols.isEmpty()) {
+        return null
       }
 
-      // No kotlin.test and no org.junit. No Burst for you.
-      return null
+      return BurstApis(pluginContext, testClassSymbols)
     }
   }
-
-  val testClassSymbol: IrClassSymbol = pluginContext.referenceClass(testPackage.classId("Test"))!!
-  val burstValues: IrFunctionSymbol = pluginContext.referenceFunctions(burstValuesId).single()
 }
 
 private val burstFqPackage = FqPackageName("app.cash.burst")
@@ -56,11 +65,10 @@ private val burstValuesId = burstFqPackage.callableId("burstValues")
 
 private val junitPackage = FqPackageName("org.junit")
 private val junitTestClassId = junitPackage.classId("Test")
+private val junit5Package = FqPackageName("org.junit.jupiter.api")
+private val junit5TestClassId = junit5Package.classId("Test")
 private val kotlinTestPackage = FqPackageName("kotlin.test")
 private val kotlinTestClassId = kotlinTestPackage.classId("Test")
 
-internal val IrAnnotationContainer.hasAtTest: Boolean
-  get() = hasAnnotation(junitTestClassId) || hasAnnotation(kotlinTestClassId)
-
 internal val IrAnnotationContainer.hasAtBurst: Boolean
   get() = hasAnnotation(burstAnnotationId)
diff --git a/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstIrGenerationExtension.kt b/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstIrGenerationExtension.kt
index 56ee81a..4ba2bc0 100644
--- a/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstIrGenerationExtension.kt
+++ b/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstIrGenerationExtension.kt
@@ -61,7 +61,7 @@ class BurstIrGenerationExtension(
         val originalFunctions = classDeclaration.functions.toList()
 
         for (function in originalFunctions) {
-          if (!function.hasAtTest) continue
+          val testAnnotationClassSymbol = burstApis.findTestAnnotation(function) ?: continue
           if (!classHasAtBurst && !function.hasAtBurst) continue
 
           try {
@@ -70,6 +70,7 @@ class BurstIrGenerationExtension(
               burstApis = burstApis,
               originalParent = classDeclaration,
               original = function,
+              testAnnotationClassSymbol = testAnnotationClassSymbol,
             )
             specializer.generateSpecializations()
           } catch (e: BurstCompilationException) {
diff --git a/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/FunctionSpecializer.kt b/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/FunctionSpecializer.kt
index 01ee258..6136cea 100644
--- a/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/FunctionSpecializer.kt
+++ b/burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/FunctionSpecializer.kt
@@ -25,9 +25,9 @@ import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.declarations.IrValueParameter
+import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.UnsafeDuringIrConstructionAPI
-import org.jetbrains.kotlin.ir.types.classFqName
-import org.jetbrains.kotlin.ir.types.starProjectedType
+import org.jetbrains.kotlin.ir.types.classOrNull
 import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.name.Name
 
@@ -63,6 +63,7 @@ internal class FunctionSpecializer(
   private val burstApis: BurstApis,
   private val originalParent: IrClass,
   private val original: IrSimpleFunction,
+  private val testAnnotationClassSymbol: IrClassSymbol,
 ) {
   fun generateSpecializations() {
     val valueParameters = original.valueParameters
@@ -84,7 +85,7 @@ internal class FunctionSpecializer(
 
     // Drop `@Test` from the original's annotations.
     original.annotations = original.annotations.filter {
-      it.type.classFqName != burstApis.testClassSymbol.starProjectedType.classFqName
+      it.type.classOrNull != testAnnotationClassSymbol
     }
 
     // Add new declarations.
@@ -112,7 +113,7 @@ internal class FunctionSpecializer(
       }
     }
 
-    result.annotations += burstApis.testClassSymbol.asAnnotation()
+    result.annotations += testAnnotationClassSymbol.asAnnotation()
 
     result.irFunctionBody(
       context = pluginContext,
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b18c0ec..62229e3 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -10,6 +10,7 @@ binary-compatibility-validator-gradle-plugin = { module = "org.jetbrains.kotlinx
 dokka-gradle-plugin = { module = "org.jetbrains.dokka:dokka-gradle-plugin", version = "1.9.20" }
 google-ksp = "com.google.devtools.ksp:symbol-processing-gradle-plugin:2.0.21-1.0.26"
 junit = { module = "junit:junit", version = "4.13.2" }
+junit-vintage-engine = { module = "org.junit.vintage:junit-vintage-engine", version = "5.11.3" }
 kotlin-compile-testing = { module = "dev.zacsweers.kctfork:core", version = "0.5.1" }
 kotlin-gradlePlugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test" }